“We just have to carry on and do the best that we can and hopefully nothing will happen,” said Kerr.

Police Commissioner Ray Kelly said Friday that New York City started preparing for this the day after the Boston marathon. There will be extra surveillance cameras, NYPD escorts for runners. NYPD harbor units will escort ferries that transport thousands of runners. They are not leaving anything to chance.

David Fortier is running the marathon for a rare form of cancer, but he’s also running for those who fell in Boston and wished him luck in New York.